The claim that a language determines the thought is called?

The claim that a language determines the thought is called the Sapir-Whorf hypothesis, also known as the linguistic relativity hypothesis.

It's important to note that there are actually two versions of this hypothesis:

* Strong version: This version states that language completely determines thought. This version is generally considered to be too strong and is not widely accepted by linguists.

* Weak version: This version states that language influences thought, but doesn't completely determine it. This version is more widely accepted, though it's still a topic of ongoing debate.

The Sapir-Whorf hypothesis has been influential in fields like cognitive science, psychology, and anthropology, and it continues to spark debate about the relationship between language and thought.